Thanks for your feedback; we've recently made a few fixes for the storyboarder importer after some changes in the storyboarder file format, maybe something else changed with the latest version of Storyboarder.

Could you send me a .storyboarder file which does not import correctly so I can have a look at that and fix it?

I also had problems importing storyboards.
I found that since I had only used fill layers, there were no reference layers in the .storyboard(json)-file to to be imported, crashing the import.
After adding reference layers by drawing some more lines, the importer crashed on this bit at line 23732:

I have fixed the storyboarder import when there are no layers on the board

I don't understand the crash you mention though, there's no actual difference between the two snippets. Anyway, in all my tests it now works correctly, and the fix will be available in the next update, today or tomorrow!

It's not working for me, I use after effect CC2018 and the script WUstoryboarderAE_0.1.
And when I press the " select storyboarder files " button, then, nothing happen :/
maybe I don't use the correct script ? Maybe there is a new one for after effect CC2018 ?

You are talking about an update,
Is there a link to the last update of WUstoryboarderAE script ?